LXR linux/drivers/hid/hid-kensington.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 *  HID driver for Kensigton Slimblade Trackball
   4 *
   5 *  Copyright (c) 2009 Jiri Kosina
   6 */
   7
   8/*
   9 */
  10
  11#include <linux/device.h>
  12#include <linux/input.h>
  13#include <linux/hid.h>
  14#include <linux/module.h>
  15
  16#include "hid-ids.h"
  17
  18#define ks_map_key(c)   hid_map_usage(hi, usage, bit, max, EV_KEY, (c))
  19
  20static int ks_input_mapping(struct hid_device *hdev, struct hid_input *hi,
  21                struct hid_field *field, struct hid_usage *usage,
  22                unsigned long **bit, int *max)
  23{
  24        if ((usage->hid & HID_USAGE_PAGE) != HID_UP_MSVENDOR)
  25                return 0;
  26
  27        switch (usage->hid & HID_USAGE) {
  28        case 0x01: ks_map_key(BTN_MIDDLE);      break;
  29        case 0x02: ks_map_key(BTN_SIDE);        break;
  30        default:
  31                return 0;
  32        }
  33        return 1;
  34}
  35
  36static const struct hid_device_id ks_devices[] = {
  37        { HID_USB_DEVICE(USB_VENDOR_ID_KENSINGTON, USB_DEVICE_ID_KS_SLIMBLADE) },
  38        { }
  39};
  40MODULE_DEVICE_TABLE(hid, ks_devices);
  41
  42static struct hid_driver ks_driver = {
  43        .name = "kensington",
  44        .id_table = ks_devices,
  45        .input_mapping = ks_input_mapping,
  46};
  47module_hid_driver(ks_driver);
  48
  49MODULE_LICENSE("GPL");
  50